removed if check from add_products_to_database

src/monitor_utils/database.py

@@ -82,9 +82,6 @@ async def add_products_to_database(
             keep one doc per variant; other monitors collapse to one doc per
             product_id.
     """
-    if not products:
-        return
-
     doc_ids = [
         build_doc_id(p.product_id, category_identifier, use_composite) for p in products
     ]